In the merchant portal Data vault > Administration > Client Service Portal page added a new setting.
'Allow user to change plan payment dates' checkbox enables/disables Change Payment Date functionality in CSP portal:
A new page is available on the Client Portal > Action > Change Payment Date.
There Data Vault client is able to click ‘Change Payment Date’ for the plan and change frequency for the plan:
Or just click ‘Change’ near the payment and change a date for selected payment:
It allows client to change plan scheduled dates from CSP.